Where can I find guides on Villager Trading/Breeding?

Hi guys, long time Minecrafter here (purchased the game in 2009) who is just getting back into it after about 5 years since I properly played.

After watching YouTube I've realised that the 'meta' has now very much switched to Villager trading/breeding and this is something that I have never really explored in the game. With that, I was wondering if there are any guides out there which explain the mechanics of villager breeding and trading as I understand this is probably the best and easiest way to become overpowered.

Any direction would be appreciated. Thanks :)